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Green tea grabs all the headlines as a tumor-taming brew, but the white kind surpasses it at preventing colon cancer. When researchers at Oregon State University's Linus Pauling Institute tested the two teas' abilities to block colon-polyp growth, the blanc beverage was about 10 percent more effective. In fact, it stopped polyps as effectively as sulindac, a powerful anti-inflammatory drug.

And while prescription anti-inflammatories can cause internal bleeding and ulcers, "tea is pretty much guaranteed not to cause side effects," says Gayle Orner, Ph.D., the study's lead author. The study used Exotica white tea (80 tea bags for $20 at stashtea.com); 3 cups a day may be enough to cut your cancer risk.